<div style="overflow: auto;height: 400px; float:left">
<% @friends.each do |f| %>
  <%= check_box_tag "group[fb_user][#{f.uid}]" %><%= image_tag f.pic_square if f.pic_square  %><%= f.name %><br/>
<% end %>
</div>
<div style="clear: both"></div>